[Crown margins and problems affecting the periodontium].
D003442:Crowns / Q000009:adverse effects* / Q000592:standards; D006801:Humans; D010510:Periodontal Diseases / Q000517:prevention & control; D010519:Periodontium / Q000503:physiopathology*
Ta auchenika oria ton stephanon kai ta problemata tous se schese me to periodontio.